Mariel Gillham, M. D.
Internal Medicine Physician · Colorado Springs, CO
Mariel Gillham, M. D. is an internal medicine physician with a practice address in Colorado Springs, Colorado, and NPI 1952620460, issued on May 24, 2010. Check the license (Colorado DR.0071609, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mariel Gillham
- Credential
- M. D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- DR.0071609 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1400 E Boulder St Ste 2508, Colorado Springs, CO 80909
- Phone
- (719) 365-1292
- Enumerated
- May 24, 2010
- Record last updated
- Dec 20, 2023
- Fax
- (719) 365-6997
- Medicare enrollment
- Enrolled (PECOS I20231116003195); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 1400 E Boulder St Ste 2508
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mariel Gillham in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0071609Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
127 Medicare Part D claims for 58 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Pantoprazole Sodium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Poudre Valley Medical Group LLCColorado Springs, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mariel Gillham among 2,046 internal medicine physician records in Colorado
Mariel Gillham, M. D. is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 68% of them.
- NPI issued2010 · 68% of these records are older, 31% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2010 · median 2006 among the 1,090 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
169 internal medicine physician records list a practice address in Colorado Springs
They are 169 of the 19,771 NPPES records with a practice address in Colorado Springs, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Colorado Springs → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Craig Cole, MDColorado Springs, CO 809091528174018
- Amy Curran, M.D.Colorado Springs, CO 809091790780732
- Christopher EvilsizerColorado Springs, CO 809091043215775
- Richard Harbison, M.D.Colorado Springs, CO 809091295784841
- Janak Joshi, MDColorado Springs, CO 809091104820539
Common questions
What is Mariel Gillham, M. D.'s NPI number?
Mariel Gillham, M. D.'s National Provider Identifier (NPI) is 1952620460, issued on May 24, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mariel Gillham, M. D. located?
The NPPES record lists a practice address at 1400 E Boulder St Ste 2508, Colorado Springs, CO, 80909. Phone: (719) 365-1292. Providers update this record themselves, so call before visiting.
How can I verify Mariel Gillham, M. D.'s license?
NPPES lists Colorado license number DR.0071609, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mariel Gillham, M. D. prescribe under Medicare Part D?
In 2024, Mariel Gillham, M. D. had 127 Medicare Part D claims for 58 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mariel Gillham, M. D.'s MIPS final score?
The 2023 MIPS final score is 88.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.